ethyl N-[4-(1-hydroxy-1-phenylprop-2-ynyl)phenyl]carbamate   、                                                                                      
Pentacyclo[12.8.0.02,11.03,8.015,20]docosa-1,3,5,7,11,13,15,17,19,21-decaen-13-ol                                                                                                                                                              在
                                                                                                                                         camphor-10-sulfonic acid                                                                                                                                                                          作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 3.5h,
                                                                                                                生成                                                 ethyl N-[4-(15-phenyl-16-oxahexacyclo[16.8.0.02,11.03,8.012,17.019,24]hexacosa-1(18),2(11),3,5,7,12(17),13,19,21,23,25-undecaen-15-yl)phenyl]carbamate